import java.util.Scanner;

public class Text19092305 {
	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		int r,x,p;
		r=scanner.nextInt();
		x=scanner.nextInt();
		p=scanner.nextInt();
		double j = 1,y;
		for(int i=1;i<=p;i++) {
			j*=(100+r)/100.0;
		}
		y=x*j;
		System.out.printf("%.2f",y);
		scanner.close();
	}
}
